Quick-adjustable screw-wrench



' J. M. GREN ZFELDER.

QUiCK ADJUSTABLE SCREW WRENCH.

APPLICATION FILED FEB. I4, 1919- Patented June 15, 1920,

' 11v VENTOR J. M fine-nape, 05

A TTORNEY UNITED STATES rrief JULIUS MAX GRENZFELDER, OF ST. LOUIS, MISSOURI.

QUICK-ADJUSTABLE SCREW -WRENCH.

Specification of Letters Patent.

Patented June 15,1920.

To all whom it may concern:

Be it known that I, JULIUS MAX GRnNz- FELDER, a citizen of the United States, residing in the city of St. Louls and State of Missouri, have invented new and useful Improvements in Quick-Adjustable ScrewlVrenches, of which the following is a speclfication, reference being had to the accompanying drawings.

This invention pertains to quick acting adjustable screw wrenches, and the primary object of the invention is to provide a combination wrench adaptable for use upon nuts of various sizes as well as for use as a pipe wrench.-

Another object is to produce such a wrench in a simple, practical and eiiicient form,

readily adaptable to the different classes of work mentioned.

lVith these objects in view, attention is called to the accompanying drawings wherein Figure 1 shows a side elevation ofsuch a wrench;

Fig. 2, a frontal edge view;

Fig. 3 a longitudinal sectional elevat1on taken on the line BB in Fig. 2.

Fig. 4, a cross-section taken on the line A-A in Fig. 1; V

Fig. 5, sectional details showing the construction of the chucks.

Referring more particularly to the drawings, my invention consists of a front jaw' 1, having its rigidly attached and rearwardly extending shank 2 made in any suitable form, as round, or flat as shown in drawings. Upon this rearwardly extending shank is out a complete or segmental screw 3. The rear or handle portion of the wrench 4 carries the rear jaw 5 and the hollow handle 6. At the point of juncture of the rear jaw 5 with the handle 4, a circular recess 7 is chambered out, said recess 7 being extended forwardly to form the forward slot 8 and backwardly to form the rearward slot 9, by means of which the shank 2 may be mounted through the recess 7 by inserting same through the forward slot 8 and thence back through the rearward slot 9. The rearward slot 9 communicates with the hollow 10 of the handle 6, and within the recess 7 are mounted two slotted chucks 11 and 12, which overlap one another and constitute the segments of a complete disk. The two chucks together thus present an outer circular periphery to meet the inner circular periphery of the recess 7, which thus. acts as a boxing for the chucks 11 and l2.v The chucks 11 and 12 are centrally and trans-. versely chambered out to form a transverse recess 13 adapted to receive and hold the interiorlythreaded cylindrical nut 14, and they also have longitudinally extended slots 8 and 9 to cooperate withthe slots 8 and 9 for engaging the shank 2 which passes backward through said slots. The said nut 14 carries interior threads 15 which mesh with the screw 3 cut on the shank 2, as aforesaid. The chucks 11 and 12 are made separable and with projected lips 11 and 12 which carry concaved'inner faces 16 and 17 adapted to overlap the convexed outer face 'of the cylindrical nut 14, and thereby hold the said cylindrical nut 14 securely in place when the elements of the wrench are assembled.

To assemble this wrench all that is 116GB? sary is to insert the cylindrical nut 14 be tween the chucks 11 and 12, then place these elements within the recess 7, then thrust the shank 2 through the forward slots 8 and .8 and through the cylindrical nut 14, thence through the rear slots 9 screw 3, the shank 2 is drawn on down through the rear slot 9. The hollow 10 of the handle 6 is adapted to snugly yet freely receive the shank 2. A thimble 18 is adapted to slide along and upon the hollow handle 6 and over the shank 2, thereby holding the shank 2 within and in alinement with the hollow handle 6, when it is desired to use the wrench as a nut wrench. The inner faces of the jaws 1 and 5 may be roughened or serrated for use as a pipe wrench.

In use, it will be seen that by throwing the shank 2 within the hollow 10 of the handle 6 and sliding the thimble 18 down over the shank 2, the wrench is in rigid position for use upon ordinary nuts in usual form, and may be readily adjusted to different sized nuts by turning the cylindrical nut 14 in either direction. Itsposition for such use is shown in Fig. 1. The wrench may be adapted for use as a pipe wrench by throwing it into the position shown in Fig. 3, by withdrawing the thimble 18 from the shank 2, thus allowing the shank 2 to swing out from the hollow 10 of the handle 6, whereby the jaw 1 swings out and assumes the necessary inclination required for use as a pipe wrench. Also, by turning the cylindrical nut 14, the jaws may be adjusted to differ-' specific method I I tary, segmental chucks,

ent sizes of pipes. By extending the hand over the handle 6 and down under the shank 2, and exerting the usual force upon the wrench, it is evident the aws 5 and 1 would be forcibly pressed upon the pipe. It is also evident that by drawing the handle 6 and the shank 2 together by means of the fingers, and at the same time pressing down upon the handle, extraordinary force may be exerted upon the pipe through the jaws 1 and 5. Likewise, with the shank 2 hanging loosely from the handle (as for use as a pipe wrench) square nuts may be very rapidly worked, by allowing the rear jaw to open and close through the swinging of the shank out and in, alternately, the jaws passing loosely over the nut on their movement for a new grip, after the manner of a ratchet wrench.

While I have herein described a certain of constructing and assem-- bling the elements of my invention, it is understood I may vary from the same in minor details, not departing invention as laid down in the appended claims, so'as to produce a wrench to meet all general requirements or special purposes.

What I claim to be new and patentable is:

' l. A quick adjustable screw wrench, comprising a rearwardly disposed handle having a longitudinal recess along its under side; a rear-jaw rigidly mounted at the forward end of said handle; a circular recess chambered out at the juncture of the said rear jaw with said handle; longitudinal slots extending forwardly and backwardly from said circular recess; two complemenhaving overlapping, concaved lips adapted to hold a cylindrical nut rotatably mounted between them and being slotted longitudinally in alinement with o I the slots extending from said circular recess;

a cylindrical nut, threaded interiorly to mesh with the screw on the shank described; a forwardly disposed, rearwardly extending shank, provided with a screw to engage the nutaforesaid, mounted through said slots and said nut, and adapted to swing up into and out from the longitudinal recess in the handle aforesaid. V

2. A quick adjustable screw wrench, comprising a forwardj aw having a backwardly from'the spirit of my of said shank;

shank with a worm out theretending slots to receive and engage the backwardly extending shank aforesaid, and being further chambered out transversely and mediall between said slots with a circular recess adapted to receive and hold two segmental chucks; two segmental chucks mounted as aforesaid within said circular recess, same having overlapping, concave lips nally in alinement with the slots extending from said circular recess, to engage said shank, the latter extending backwardly and being adapted to swing into and out of the hollowed out handle aforesaid; a cylindrical nut threaded to mesh with'the screw aforesaid and mounted, as stated, between said chucks; and means .for locking the shank into fixed position within said handle.

8. A quick adjustable screw wrench, comprising a handle recessed along its under side; a rear jaw end of said handle; a longitudinal slot piercing said jaw and emerging fan-like at its front and back faces; a transverse, circular chamber cut medially through said slot; two complementary overlapping chucks rotatably mounted in said chamber, same slotted longitudinally to correspond with the slot through said jaw, and their overlapping lips being adapted to freely engage a cylindrical nut disposed transversely between them; a cylindrical, interiorly threaded nut, rotatably disposed as aforesaid between said chucks; a shank having a screw cut thereon, passing freely through said slots in said jaw and chucks and through said nut, the threads of which the shank screw engages; a forward jaw mounted at the forward end and releasable means for locking the backwardly extended end of said shank into the recess in said handle.

JULIUS MAX GRENZFELDER. Witnesses:

A. K; DOHLE, A. M. Down.

mounted at the forward being adapted to receive and rotatably hold a cylindrical nut, and being slotted longitudi- 

